Bug 1252282 (CVE-2015-4478)

Summary: CVE-2015-4478 Mozilla: Redefinition of non-configurable JavaScript object properties (MFSA 2015-82)
Product: [Other] Security Response Reporter: Huzaifa S. Sidhpurwala <huzaifas>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: jhorak, security-response-team, stransky
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2015-08-25 03:54:22 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 1248359, 1251515    

Description Huzaifa S. Sidhpurwala 2015-08-11 06:19:34 UTC 
Security researcher André Bargull reported non-configurable properties on JavaScript objects can be redefined while parsing JSON in violation of the ECMAScript 6 standard. This allows malicious web content to bypass same-origin policy by editing these properties to arbitrary values.



External Reference:

https://www.mozilla.org/security/announce/2015/mfsa2015-82.html


Acknowledgements:

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges André Bargull as the original reporter.
Comment 1 errata-xmlrpc 2015-08-11 19:48:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 7

Via RHSA-2015:1586 https://rhn.redhat.com/errata/RHSA-2015-1586.html